Typewriting machine



May 15, 1923. I 11,455,2W1

E. B. HESS TYPEWRITING MACHINE FiledJune 14, 1922 z kw Qq-MSP Patented May 35, 123,

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EDWARD B. HESS, OF NEW YORK, N. Y., ASSIGNOR TO ROYAL TYPEWRI'I'ER COMPANY,

INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TYPEWRITING: MACHINE.

Application filed June 14, 1922. Serial No. 568,171.

To all whom it may concern:

Be it known that I, EDWARD B. Hess, a citizen of the United States, residing at Manhattan Beach, in the county of Kings,

New York, and State of New York, have in.- vented certain new and useful Improvements in-Typewriting Machines, of which the following is a specification.

This invention relates to the platens of typewriting machines, and the object Oflllfi invention is to provide a simple and efliclent device which may serve as an auxiliary platen when a large number of carbon copies is desired/ For general service, a c'ylmdrical platen of relatively soft material has been found to be most desirable, but when multiple manifolding was required it has been customary to remove the soft cylindrical platen and replace it by a hard platen.

In my U. S. Patent N 0. 1,424,905 of Aug. 8,

1922, a machine is shown in which an auxiliary platen consisting of a strip of metal is associated with the main or cyllndrical soft platen and is so supported on the machine that it may be moved from inactive to active position or vice versa by a very simple operation. According to my present invention instead of permanently connecting the auxiliary platen with the machine I make it detachable therefrom and readily applicable thereto.

In the preferred form of my present 1n vention, the auxiliary platen is made from some hard material, such as metal, and is of such length as to extend from end to end of the main platen and slightly beyond its ends. It is curved to correspond with the curvature of the main platen and is so formed on one end that it may be readily supported when detached from the machine. Preferably also the strip is provided with a scale so that it may be used as a desk ruler if desired.

In the accompanying drawings Figure 1 shows portion of a typewriting machine with my invention applied thereto. The remaining figures are on an enlarged scale.

Figure 2 is a front elevation of some of the parts shown in Figure 1.

Figure 3 is a view looking at the inside of the left hand side plate of the typewriter carriage and section.

Figure 4 is a view looking at the outside of the right hand side plate of the carriage.

Figure 5 is a detail view showing in side elevation the latch employed for holding the auxiliary platen in active position, the auxiliary platen being shown in section.

Figure 6 is a detail view of the right hand end of the auxiliary platen showin the notch to receive the tooth on the latcfi and the hole to facilitate in supporting the auxiliary platen when removed from active position.

A portion of the carriage frame of a typewriting machine is indicated at A and B indicates the main or cylindrical platen of usual construction and comprising relatively soft material. C indicates a segment, D a type bar and E part of the type action which is preferably of the kind shown in my Patent No. 1,390,708 of Sept. 13, 1921, in which provision is made for reducing the noise of the impact of the type bars on the platen.

The auxiliary platen G is preferably in the form of a thin strip made of metal curved to conform to the curvature of the main platen as indicated in Figure 3 and extending from end to end of the .main platen and slightly beyond its ends. One end 9 of the strip is preferably tapered as shown, and the other end has a hole 9 in it so that the strip may be readily applied to and held by a nail or other support when the auxiliary platen is not in use on the machine. The strip is provided with a scale as shown in order that it may be used as a desk ruler if desired.

In order to connect the auxiliary platen with the machine one of the side plates of the carriage, preferably the left hand side plate, is formed with a curved slot a closed at opposite ends and of such size as to receive the tapered end of the strip which closely fits the slot when moved inwards to its fullextent. In this way one end of the strip is supported and held accurately in the line of print. The opposite end of the strip is supported by the right hand side plate of the carriage. As shown, this side plate is formed with a curved slot a (Figure shows the auxiliary platen in 4) concentric with the face of the platen and corresponding with the'curvature of the strip and open at its upper end. When the tapered end slot 0 and the opposite. end is lowered in the slot (1 in the manner indicated in Figure 2,.the strip may be held in the line ofprint close to themain platen. In this way a hard surface is provided and multiple manifolding may be performed. The strip is made smooth and is adapted to conform to the shape of the type which operate upon it. The cylindrical platen affords a firm backing for the strip if the latter tends to bend.

In order to securely hold the strip in place I provide a latch H pivoted at hto the carriage frame and normally drawn into enagement with the strip by a spring K.

he latch has a tooth h which enters a slot 9 in the strip. In this way the strip is prevented from rising and also from moving endwise or moving in any direction whatever.. When in place the strip affords an efiicient means for obtaining a large number of carbon copies. It does not in any way interfere with anyof the mechanism forming parts of a typIewriting machine as usually constructed.- t does not involve expensive or complicated modifications of the machine and it may be very quickly aplied to or withdrawn from active Position.

It will be observed that the supporting devices for the auxiliary platen are wholly in front of the main platen and are at opposite ends thereof.

As shown in Figure 3, the slot at is slightly enlarged or widened to facilitate the introduction of the tapered end of the strip and to insure the proper relation of the strip to the main platen.

No claim is made herein to the combination with a soft cylindrical platen for general service, of a noise reducing type action and an auxiliary platen of relatively hard material adapted to be held in the line ofprint for multiple manfold purposes as such subject matter is covered by several claims to this broad feature and amplifications thereof in my application for patent filed June 22, 1922.

I claim as my invention:-

1. In a typewriting machine, the combination with a main or cylindrical platen, of an auxiliary platen in the form of a strip of relatively hard material curved to correspond to the curvature of the main platen and mounted in supports having guiding portions curved correspondingly with the curvature of the platen and which guiding portions are arranged wholly in front of the main platen.

2. In a typewriting machine, the combination with a main or cylindrical platen of relatively softmaterial, of an auxiliary platen in the form of a strip of relatively of the strip is inserted in thehard material supported and guided at opposite ends in front of the main platen by. slotted portions of the side plates of the carriage.

In a typewriting machine, the combination with a main or cylindrical platen, of an auxiliary platen in the form of a strip of relatively hard material supported in the side plates of'the carriage and held in place by a latch.

4. In a typewriting machine, the combination with a main or cylindrical platen, of carriage side plates in which it.is mounted and which are formed with slots to receive an auxiliary platen, and an auxiliary platen in the form of a strip of relatively hard ma terial supported in front of the main platen in said slots.

'5 In a typewriting machine, the combination of a main or cylindrical platen, carriage side plates in which it is supported, one of which is formed with a closed slot and the other with an open slot, and an auxiliary platen in the form of a strip, one end of which enters the closed slot and the other the open ended slot.

6. n a typewriting machine, the combination with a main or cylindrical platen, of the carriageside plates in which itis supported and which are formed with slots to receive an auxiliary platen, an auxiliary platen in the form of a strip, one end of which enters one of the slots and the opposite end the other slot, and a spring latch eiligaging the auxiliary platen. to hold it in p ace.

7. In a typewriting machine, the combination of a main or cylindrical platen, carriage side plates in which it is supported, one of which is formed with a closed slot and .the other with an open ended slot, an auxiliary platen in the form of a strip of relatively hard material, one end of which enters the closedslot and the other the open. ended slot, and. the last mentioned end portion is formed with a notch and a latch having a tooth entering said notch for holding the auxiliary platen in place.

8. An auxiliary platen for typewriting machines curved to conform with the curvature of a main platen and having a scale along one of its longitudinal edges and having also a perforated handle at one end to facilitate in adjusting it and for supporting said auxiliary platen when not in use.

9. An auxiliary platen for typewriting machines of relatively hard material, having a scale on one of its longitudinal edges being tapered at one end and formed with a perforated handle at its opposite end.

10. In a typewriting machine, the combination with a main or cylindrical platen, of an auxiliary platen in the form of a strip'of relatively hard material curved to correspond to the curvature of the main platen and mounted in supports having slotted guiding portions concentric With the face of the main plat/en.

11. In a typewriting machine the combination with a main or cylindrical platen, of an auxiliary platen in the form of a strip of relatively hard material curved to correspond with the curvature of the main platen in Q2) 

